<template>
  <div class="auth-page">
  <div class="container page">
    <div class="row">

      <div class="col-md-6 offset-md-3 col-xs-12">
        <h1 class="text-xs-center">{{ loginText }}</h1>
        <p class="text-xs-center">
          <nuxt-link v-if="isLogin" to="/register">Need an account?</nuxt-link>
          <nuxt-link v-else to="/login">Have an account?</nuxt-link>
        </p>

        <ul class="error-messages">
          <template v-for="(messages, filed) in errors">
            <li v-for="(msg, index) in messages" :key="index">{{filed}} {{msg}}</li>
          </template>
        </ul>

        <form @submit.prevent="onSubmit">
          <fieldset v-if="!isLogin" class="form-group">
            <input v-model="user.username" class="form-control form-control-lg" type="text" placeholder="Your Name" required>
          </fieldset>
          <fieldset class="form-group">
            <input v-model="user.email" class="form-control form-control-lg" type="email" placeholder="Email" required>
          </fieldset>
          <fieldset class="form-group">
            <input v-model="user.password" class="form-control form-control-lg" type="password" placeholder="Password" required minlength="8">
          </fieldset>
          <button class="btn btn-lg btn-primary pull-xs-right">
            {{ loginText }}
          </button>
        </form>
      </div>

    </div>
  </div>
</div>

</template>

<script>
import { login, register } from '@/api/user.js'

// 仅在客户端加载该包
const Cookie = process.client ? require('js-cookie') : undefined
export default {
  name: 'login',
  middleware: 'notAuthenticated',
  data() {
    return {
      user: {
        username: '',
        email: '',
        password: ''
      },
      errors: {}
    }
  },
  computed: {
    isLogin() {
      return this.$route.name === 'login'
    },
    loginText() {
      return this.isLogin ? 'Sign in' : 'Sign up'
    }
  },
  methods: {
    async onSubmit() {
      try {
        const {email, password} = this.user
        const {data} = this.isLogin
                        ? await login({
                            user: {email, password}
                          })
                        : await register({
                          user: this.user
                        })

        // TODO: 保存用户登录状态
        this.$store.commit('setUser', data.user)

        // 为了防止页面刷新，数据丢失，需要持久化存储
        Cookie.set('user', data.user)

        this.$router.push('/')
      } catch (err) {
        this.errors = err.response.data.errors
      }
    }
  }
}
</script>

<style lang='scss' scoped>

</style>
